Adding examples for fine-tuning

I need to add examples to the training_data.jsonl file so that the API is clear on how it should respond. How do I add these examples? What structure should the examples have? How does the API differentiate the examples from the rest of the information?

This is a good place to start,

https://platform.openai.com/docs/guides/fine-tuning

Also consider recipes from the OpenAI Cookbook, I.e.